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Related Experiment Videos

Intraocular lens designed for the newborn infant eye.

A Lundvall1, U Kugelberg, B Lundgren

  • 1St Erik's Eye Hospital/Karolinska Institute, Stockholm, Sweden. anna.lundvall@sankterik.se

Journal of Cataract and Refractive Surgery
|June 16, 2001
PubMed
Summary

This study found that a small intraocular lens (IOL) implanted after clear lens extraction in rabbits is safe and significantly reduces after-cataract formation compared to control eyes.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Animal Models

Background:

  • Clear lens extraction is a procedure to remove the natural lens.
  • Small eyes present unique challenges for intraocular lens (IOL) implantation.
  • After-cataract formation is a common complication after lens extraction.

Purpose of the Study:

  • To evaluate the safety and efficacy of a specialized small-eye intraocular lens (IOL) after clear lens extraction.
  • To assess the impact of this IOL on after-cataract development and ocular growth in an animal model.

Main Methods:

  • Clear lens extraction was performed in rabbit eyes.
  • A small IOL with long haptics was implanted in one randomly selected eye per rabbit.
  • Ocular parameters and after-cataract mass were measured over six months.

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Main Results:

  • The small-eye IOL remained well-centered in all implanted eyes.
  • Pseudophakic eyes (with IOL) showed significantly less after-cataract (median 30 mg) compared to aphakic eyes (median 250 mg).
  • Ocular growth was reduced in pseudophakic eyes during the initial postoperative period.

Conclusions:

  • Implantation of a down-sized IOL with long haptics in small eyes is a safe procedure.
  • This specialized IOL effectively minimizes after-cataract formation, improving outcomes after clear lens extraction.